/* flex弹性布局 */
.flex {
  display: flex;
}

.flex-auto {
  flex: 0 0 auto;
}

.basis-10 {
  flex-basis: 20%;
}

.basis-20 {
  flex-basis: 40%;
}

.basis-25 {
  flex-basis: 50%;
}

.basis-60 {
  flex-basis: 60%;
}

.basis-80 {
  flex-basis: 80%;
}

.flex-sub {
  flex: 1;
}

.flex-twice {
  flex: 2;
}

.flex-treble {
  flex: 3;
}

.flex-row {
  flex-direction: row;
}

.flex-row-reverse {
  flex-direction: row-reverse;
}

.flex-column {
  flex-direction: column;
}

.flex-column-reverse {
  flex-direction: column-reverse;
}

.flex-wrap {
  flex-wrap: wrap;
}

.align-start {
  align-items: flex-start;
}

.align-end {
  align-items: flex-end;
}

.align-center {
  align-items: center;
}

.align-stretch {
  align-items: stretch;
}

.align-baseline {
  align-items: baseline;
}

.self-start {
  align-self: flex-start;
}

.self-center {
  align-self: center;
}

.self-end {
  align-self: flex-end;
}

.self-stretch {
  align-self: stretch;
}

.self-baseline {
  align-self: baseline;
}

.justify-start {
  justify-content: flex-start;
}

.justify-end {
  justify-content: flex-end;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.justify-around {
  justify-content: space-around;
}